AS 2947.3-1995

1 - AS 2947.3-1995 INSULATORS - PORCELAIN AND GLASS FOR OVERHEAD POWER LINES - VOLTAGES GREATER THAN 1000 V.A.C. - COUPLINGS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 REFERENCED DOCUMENTS
9 - SECTION 2 DIMENSIONS OF BALL AND SOCKET COUPLINGS OF STRING INSULATOR UNITS
9 - 2.1 GENERAL
9 - 2.2 PIN BALL
9 - 2.3 SOCKET
9 - 2.4 HOOK-ON ‘GO’ GAUGE
9 - 2.5 LOWER PART OF THE INSULATOR
10 - 2.6 LOCKING DEVICE
18 - SECTION 3 DIMENSIONS OF CLEVIS AND TONGUE COUPLINGS OF STRING INSULATOR UNITS
18 - 3.1 GENERAL
18 - 3.2 DESIGNATION
18 - 3.3 DIMENSIONS
21 - SECTION 4 LOCKING DEVICES FOR BALL AND SOCKET COUPLINGS OF STRING INSULATOR UNITS: DIMENSIONS AND TESTS
21 - 4.1 GENERAL
21 - 4.2 SCOPE OF SECTION
21 - 4.3 LOCKING DEVICE
21 - 4.3.1 General
21 - 4.3.2 Split pins
21 - 4.3.3 W-clips
21 - 4.4 TEST SCHEDULE
22 - 4.5 SHAPE OF THE LOCKING DEVICE
22 - 4.5.1 Split pin
22 - 4.5.2 W-Clip
22 - 4.6 METHOD OF USING THE LOCKING DEVICES
22 - 4.6.1 Split pin
22 - 4.6.2 W-Clip
22 - 4.7 CLASSIFICATION OF TESTS
22 - 4.8 QUALIFICATION TESTS
22 - 4.9 HARDNESS
27 - 4.10 BENDING (RESISTANCE TO CRACKING)
27 - 4.11 CORROSION RESISTANCE TEST
27 - 4.12 SAMPLE TESTS
28 - 4.13 GENERAL RULES FOR THE VISUAL EXAMINATION TEST (see Item (a) in Clause 4. 12)
28 - 4.13.1 General
29 - 4.13.2 Visual examination
29 - 4.14 GENERAL RULES AND TESTS FOR ITEMS (b), (c) AND (d) IN CLAUSE 4. 12
29 - 4.14.1 General
29 - 4.14.2 Verification of dimensions
30 - 4.14.3 Hardness test
30 - 4.14.4 Bending (resistance to cracking)
30 - 4.15 RE-TEST PROCEDURE
31 - SECTION 5 DIMENSIONS OF INSULATOR PIN HOLES
31 - 5.1 SCOPE
31 - 5.2 DIMENSIONS
32 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
32 - A1 SCOPE
32 - A2 STATISTICAL SAMPLING
32 - A3 PRODUCT CERTIFICATION
32 - A4 SUPPLIER’S QUALITY SYSTEM
33 - A5 OTHER MEANS OF ASSESSMENT
34 - APPENDIX B - POSITION OF THE PIN BALL IN THE SOCKET END
35 - APPENDIX C - GAUGES FOR BALL AND SOCKET COUPLINGS
35 - C1 SCOPE
35 - C2 TOLERANCE SYSTEM
35 - C3 CONSTRUCTIONAL FEATURES OF THE GAUGES
35 - C4 PIN BALLS
36 - C5 SOCKET ENDS
37 - C6 PIN ‘GO’ GAUGE FOR BALL HEIGHT, SHANK DIAMETER AND SHANK LENGTH
38 - C7 PIN ‘GO’ GAUGE FOR BALL DIAMETER
39 - C8 PIN ‘NOT GO’ GAUGE FOR BALL HEIGHT
40 - C9 PIN ‘NOT GO’ GAUGE FOR BALL DIAMETER
40 - C10 PIN ‘NOT GO’ GAUGE FOR SHANK DIAMETER
41 - C11 SOCKET ‘GO’ GAUGE FOR ENTRY HEIGHT, ENTRY WIDTH AND NECK WIDTH
43 - C12 SOCKET ‘GO’ GAUGE FOR INTERNAL HEIGHT AND INTERNAL DIAMETER
45 - C13 SOCKET ‘NOT GO’ GAUGE FOR ENTRY HEIGHT
47 - C14 SOCKET ‘NOT GO’ GAUGE FOR NECK WIDTH
48 - APPENDIX D - ITEMS TO BE SPECIFIED BY THE PURCHASER OR SUBJECT TO AGREEMENT BETWEEN THE PURCHASER AND MANUFACTURER
48 - D1 GENERAL
48 - D2 ITEMS SUBJECT TO AGREEMENT BETWEEN THE PURCHASER AND THE MANUFACTURER
49 - APPENDIX E - GAUGES FOR W-CLIPS
51 - APPENDIX F - GAUGES FOR INSULATOR PIN HOLES
51 - F1 SCOPE
52 - F2 INSULATOR PIN HOLES

Specifies dimensions for the insulator coupling devices used with insulators of ceramic material or glass on a.c. overhead power and traction lines with a nominal voltage greater than 1000 volt and a frequency not greater than 100 Hz. It applies to insulator units, strings and sets, pin insulators, and to line post insulators and shackle insulators of similar design when used in sub-stations. Locking devices are also covered.

This Standard specifies dimensions for the following insulator coupling devices:(a) Ball and socket couplings of string insulator units.(b) Clevis and tongue couplings of string insulator units.(c) Locking devices for ball and socket couplings of insulator units.(d) Insulator pin-holes.In addition to the dimensions for locking devices given in Section 4, the appropriate tests for the split pins and W clips have been included.NOTES:1 AS 1154.1, AS 1154.2 and AS 1154.3 specify requirements for insulator and conductor fittings for overhead lines.2 Means of assessing compliance with the Standard are set out in Appendix A.

First published in part as AS C67-1939.
AS C67 Supplement 1 first published 1947.
AS C67-1939 and AS C67 Supplement 1-1947 revised amalgamated and designated AS C67-1963.
Revised and redesignated in part as AS 1137.1-1972.
Second edition 1981.
Revised and redesignated in part as AS 2947.3-1989.
Second edition 1995.